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From: "jiez at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/51552] bfin generates bad assembly
Date: Wed, 21 Dec 2011 05:09:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51552

--- Comment #2 from Jie Zhang <jiez at gcc dot gnu.org> 2011-12-21 04:35:19 UTC ---
(gdb) p insn
$23 = (rtx) 0x7ffff701b180
(gdb) pr
(parallel [
        (unspec [
                (const_int -4 [0xfffffffffffffffc])
            ] 5)
        (set/f (mem:SI (plus:SI (reg/f:SI 14 SP)
                    (const_int -4 [0xfffffffffffffffc])) [0 S4 A32])
            (reg:SI 7 R7))
        (set/f (reg/f:SI 14 SP)
            (plus:SI (reg/f:SI 14 SP)
                (const_int -4 [0xfffffffffffffffc])))

Before that commit, dwarf2out_frame_debug_expr (insn) will set any_cfis_emitted
in dwarf2out_frame_debug, which will cause dwarf2out_flush_queued_reg_saves to
emit the CFI. But after that commit, dwarf2out_frame_debug_expr (insn) will not
set any_cfis_emitted.